NGC 6404

(Collinder 340; VDBH 240; MWSC 2658; OCL 1024; vdBergh-Hagen 240; ESO 393 13)

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0.95 UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.87
Clit
1.0
Cdup
N50 (P>50% members) 716
Stellar density (N50/rad) 52.5 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.87 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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NGC 6404 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the distance, absorption, age, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 151 along with FoF_282.

Palma et al. (2025)
Part of multiple system G77, along with HSC_2946 and LP_282.

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.92 (50th percentile), true positive (human-assigned).

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.

Ahumada & Lapasset (2007)
Only straggler candidates inside a radius of 2' around the centre of coordinates have been considered.

Data
🔍 Search references for NGC 6404 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 264.915 -33.225 0.354 0.144 -0.744 9.755
Almeida et al. 2025 264.92 -33.222 – – – –
Hunt & Reffert 2024 264.911 -33.229 0.361 0.148 -0.746 59.446
Cavallo et al. 2024 264.912 -33.22 0.361 – – –
Hunt & Reffert 2023 264.911 -33.229 0.361 0.148 -0.746 59.446
Just et al. 2023 264.906 -33.234 – – – –
Jaehnig et al. 2021 264.914 -33.224 0.388 0.173 -0.697 –
Rain et al. 2021 264.916 -33.224 0.355 0.194 -0.705 –
Dias et al. 2021 264.92 -33.222 0.357 0.198 -0.698 9.38
Cantat-Gaudin et al. 2020 264.916 -33.224 0.355 0.194 -0.705 –
Cantat-Gaudin & Anders 2020 264.916 -33.224 0.355 0.194 -0.705 –
Soubiran et al. 2018 264.916 -33.224 – – – 9.91
Bica et al. 2019 264.898 -33.242 – – – –
Cantat-Gaudin et al. 2018 264.916 -33.224 0.355 0.194 -0.705 –
Kharchenko et al. 2016 264.906 -33.234 – – – –
Dias et al. 2014 264.904 -33.247 – -1.01 -0.59 –
Kharchenko et al. 2013 264.915 -33.233 – 6.3 -3.37 10.6
Morales et al. 2013 264.904 -33.247 – – – –
Gozha et al. 2012 264.904 -33.247 – – – –
Ahumada & Lapasset 2007 264.9 -33.25 – – – –
Dias et al. 2002 264.904 -33.247 – -7.73 -5.0 10.6
Lynga 1987 264.898 -33.242 – – – –
van den Bergh & Hagen 1975 264.075 -33.217 – – – –
Sulentic et al. 1973 264.887 -33.246 – – – –

💡 Note: The UCC values are estimated from its identified members.

Reference Year Dist [kpc] Av [mag] DAv [mag] Age [Myr] [Fe/H] [dex] Mass [Msun] Bfrac BSS
UCC 99999– 2.58 3.41 2.01 500 0.110 3447 – 2
Liu et al. 2025 7.38 1.31 – 151 – – – –
Almeida et al. 2025 2.77 3.65 – 6 – 3447 – –
Hunt & Reffert 2024 – – – – – 5852(1) – –
Cavallo et al. 2024 1.30 4.60 – 302 -0.830 – – –
Hunt & Reffert 2023 2.64 4.39 2.01 34 – – – –
Just et al. 2023 – – – 562 – 303 – –
Jaehnig et al. 2021 2.58(1) – – – – – – –
Rain et al. 2021 2.60 2.90 – 501 – – – 0
Dias et al. 2021 2.77 3.65 – 6 0.285 – – –
Cantat-Gaudin et al. 2020 2.50 3.47 – 100 – – – –
Kounkel et al. 2020 2.36 3.93 – 457 – – – –
Cantat-Gaudin & Anders 2020 2.60 – – – – – – –
Soubiran et al. 2018 2.60 – – – – – – –
Cantat-Gaudin et al. 2018 2.60 – – – – – – –
Kharchenko et al. 2016 2.15 3.35 – 562 – – – –
Kharchenko et al. 2013 2.15 3.35 – 562 0.110 – – –
Morales et al. 2013 2.42 – – 500 – – – –
Gozha et al. 2012 1.70 – – 501 0.110 – – –
Ahumada & Lapasset 2007 – 2.90 – 617 – – – 5
Dias et al. 2002 2.40 2.90 – 501 0.110 – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 567 80.2 264.92 -33.22 0.35 0.14 -0.74 9.75 0.0

💡 Note: The % column shows the percentage of members that NGC 6404 shares with each listed object.

Visualization
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NGC 6404 UCC
NGC 6404 HUNT23
NGC 6404 CANTAT20
Galactocentric position diagram